// Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#pragma once

#include <chrono>
#include <iomanip>
#include <iostream>
#include <ostream>
#include <stdlib.h>
#include <vector>

#include <algorithm>
#include <cstring>
#include <fstream>
#include <numeric>

#include "opencv2/core.hpp"
#include "opencv2/imgcodecs.hpp"
#include "opencv2/imgproc.hpp"
#include "opencv2/opencv.hpp"

namespace PaddleVideo
{

    class Utility
    {
    public:
        static std::vector<std::string> ReadDict(const std::string &path);

        static void GetAllFiles(const char *dir_name, std::vector<std::string> &all_inputs);

        static cv::Mat GetRotateCropImage(const cv::Mat &srcimage, std::vector<std::vector<int>> box);

        template <class ForwardIterator> inline static size_t argmax(ForwardIterator first, ForwardIterator last)
        {
            return std::distance(first, std::max_element(first, last));
        }

        static std::vector<cv::Mat> SampleFramesFromVideo(const std::string &VideoPath, const int &num_seg, const int &seg_len);
    };

} // namespace PaddleVideo
